In 2364, a ship of the class, the USS Ajax, received Kosinski's experimental warp drive upgrades, resulting in a measurable increase in performance and engine efficiency. It was later suggested that the enhancement may have been attributed to Kosinski only straightening out simple engine inefficiencies of the old ship. (TNG: "Where No One Has Gone Before")

Following the Federation's discovery of the Romulans true intentions, the invasion of Vulcan, the Romulan force retreated toward the Neutral Zone. Upon an attempted interception by the USS Enterprise-D, a Romulan Warbird destroyed the three Vulcan transports and all the troops on board. (TNG: "Unification I", "Unification II")

In the slightly modified later appearance as the Vulcan freighter, in "For the Cause", the model retained the raised aft section modification done for the appearance as the smaller Tosk's starship, the cockpit windows of the Tosk version were also covered for this appearance.